What have been people's experience of taking a decent sized multirotor (e.g. a hex with 12" props") on a commercial airline flight? I know the rules regarding Lipos, but the centre of a hexa with arms/motors/props detached looks a bit sinister. I am happy to put it in checked baggage suitably packaged. I'd be less keen to take it as hand luggage because of the size and weight (on top of carrying the lipos), though at least then one has an opportunity to explain what it is.